Every week, the TDN posts a roundup of the relevant Horseracing Integrity and Safety Act (HISA) related rulings from around the country. Among this week's rulings, trainer Lorenzo Ruiz was issued a combined 7-year suspension and charged a total of $95,000 in fines for three separate post-race positives for Diisopropylamine, a banned substance under HISA. The Horseracing Integrity and Welfare Unit (HIWU) classifies Diisopropylamine as a vasodilator, which is a substance that dilates the blood vessels to allow blood to flow more freely through them. Diisopropylamine is also found in...